Dragon, Chromium, Young Adult (CR 12)

Large Dragon (Cold)
Alignment: Always Lawful Evil
Initiative: +0; Senses: blindsense 60 ft., darkvision120 ft., low-light vision, and keen senses

AC: 23 (-1 size, +14 natural), touch 9, flat-footed 23
Hit Dice: 16d12+32 (136 hp); DR: 5/magic
Fort +15, Ref +11, Will +14
Speed: 40 ft., fly 100 ft. (poor), swim 60 ft.
Space: 10 ft./10 ft.
Base Attack +18; Grapple +29
Attack: 1 bite +24, 2 claws +19, 2 wings +19, 1 tail slap +19
Damage: 1 bite 1d8+7, 2 claws 1d6+3, 2 wings 1d4, 1 tail slap -
Special Attacks/Actions: Breath weapon 9d8 (23)
Abilities: Str 25, Dex 10, Con 19, Int 16, Wis 17, Cha 16
Special Qualities: Immunity to cold, vulnerability to fire, Pass without trace CL 5th, SR 20, Fear aura (DC 22)
Feats: #Feats: 6
Class Skills: Appraise, Bluff, Skill points: 60, and and Jump
Advancement: 17-18 HD (Large)
Climate/Terrain: Any cold mountain or underground
Organization: Solitary (1 dragon, any age), clutch (1d4+1 wyrmlings, very young, young, juvenile, or young adults), family (pair of mature adults and 1d4+1 offspring)
Treasure/Possessions: Triple Standard

Source: Dragon #356

Breath Weapon (Su): A chromium dragon has two types of breath weapon, a line of solid ice (cold) and a cone of freezing crystals. Creatures within a cone of freezing crystals take 1 point of Dexterity damage per age category of the dragon (Fortitude half).

Spell-Like Abilities: 3/day - pass without trace (ice and snow only).

Skills: Appraise, Bluff, and Jump are considered class skills for chromium dragons.

Cold Subtype

A creature with the cold subtype has immunity to cold. It has vulnerability to fire, which means it takes half again as much (+50%) damage as normal from fire, regardless of whether a saving throw is allowed, or if the save is a success or failure.